Did he say that to Soros though? because there are news circulating around that Soros finally decided to invest on crypto, why did he change his mind?
Soros has only shown his interest, but that doesn't mean he is actually going to invest in crypto. Also, he didn't point out how exactly he is planning to invest in crypto. It could very well be that he is only going to invest in financial tools tied to crypto, which a completely different division. Don't forget that most of the similar investors aren't interested in crypto itself (and thus very likely won't bother to buy crypto directly), but just the exposure it offers, and that exposure is something they can obtain through these financial tools as well.
I don't have any idea but Warren seems to stick with his notion that bitcoin will suddenly die down but so far we are still alive and breathing.
The far majority of the traditional farts were like that in the very beginning, but it's slowly turning with how even a lot of the early day skeptics and naysayers are now seeing the benefit of today's crypto currencies, and especially Bitcoin. It was the same with how the average joes were thinking about Bitcoin. They ignored Bitcoin when it was just $200, then ignored it at $500, then $1000, then $5000, etc. In other words, their believe of Bitcoin being something that will instantly vanish or become worthless, loses significance overtime with how this ecosystem and the market develop themselves.